How do I multiply decimals

First line up the decimals

3.77

x 2.8

Starting on the right, multiply each digit in the top number by each digit in the bottom number. The same as how you would do it with whole numbers

3.77

x 2.8

3016

7540

Add the products

3016+7540=10556

Count the number of decimal places there are and place them into the answer (aka 10556)

10.556